Half to charles ii



(No Model.)

3 Sheets-Sheet 2. S. T. WELLMAN.

ELEGTROMAGNET.

Patented Dec. 10, 1895.

P Iv RII INVENTOR Samuel T. Welhmm/ By his JZZivr/wys WITNESSES ANDREW B GRAHAM. FHOTOUTMQWASNINGIDN, D C

UNITED STATES" PATENT ()FFICE.

UAMFEL T. \VELLNIAN, OF UPLAND, PENNSYLVANIA, ASSIGNOR OF ONE- HALF TO CHARLES H. YVELLMAN, OF SAME PLACE.

ELECTROMAGNET.

SPECIFICATION forming part of Letters Patent No. 551,020, dated December 10, 1895.

Application filed Aprill8, 1894. Serial No. 508,010. (No model.)

To all whom it may concern.-

Be it known that I, SAMUEL T. WELLMAN, a citizen of the United States, and a resident of Upland, Delaware county, Pennsylvania, have invented certain Improvements in Electromagnets for Lifting Iron, of which the following is a specification.

The object of my invention is to so construct an electromagnet that it can be utilized for lifting large pieces onsheets of metal, and when combined with a crane to dispense entirely with the claws or chains usually employed.

The main feature of my invention is to so construct the magnet that it can be used on outside work, it being thoroughly protected from the atmosphere.

In the accompanying drawings, Figure 1 is an end view of my improved magnet. Fig. 2 is a section on the line 2 2, Fig. 3. Fig. 3 is a plan view. Figs. r and 5 are views showing it applied to an overhead traveling crane. Fig. 6 is a view of a modification of my invcntion.

A A are the cores of the magnet, preferably of the shape shown in Figs. 2 and 3, and arranged side by side, being connected by the plate A, which is secured to the cores A by bolts a. Each core is wrapped by the wires 1) b. A shell b is preferably arranged be tween each core and the wire, and a thin outer casing 11 incases each coil. 12 are the bottom plates and l) the top plates, so that it will be seen that in this instance each core is incased.

Surrounding the magnet is a shell D, extending from the top plate A to a non-magnetic bottom plate E. This non-magnetic bottom plate has openings through which the cores of the magnet extend, as clearly shown in Fig. 2.

Mounted between the top plate A, the shell D, and the coils of wire are non-conducting packing-strips e, and between the bottom plate and the said parts are packing-strips e. The top plate A is united to the bottom plate E by bolts F,provided at one end with suitable nuts, so that when the nuts are applied the several parts of the magnet are fastened securely together, preventing moisture from gaining access to the interior of the magnet.

I preferably extend the packing 6 directly against the cores of the magnet, so as to protect as much as possible the core, the ends of the core being the only parts of the magnet exposed.

On each side of the magnet are handles ff, by which it can be moved from one point to another, and secured to the top plate A in the present instance are hooks G G, to which can be attached chains when it is wished to move an article with which the magnet cannot properly engage.

The casing or shell D is preferably made in one piece, as shown in Fig. 3, and the ends united to a sheet of metal D by rivets 0r screws, as shown in Fig. 1, and I prefer to make the shell of nonmagnetic material.

The wires leading from the source of electric supply are connected to the bindingposts 1' 2", and these binding-posts are suitably coupled to the wires of the magnet.

The eye a, by which the magnet is suspended, is fastened to the plate A.

In Figs. at and 5 I have shown a magnet suspended from the carriage S of a traveling crane S, mounted on wheels 8, adapted to rails s. The wires jj are secured to the binding-post t' and extend to the carriage, which is provided with suitable brushes bearing against feed-wires 70 it. These wires extend to the switch K on the carriage of the crane, the magnet being suspended from the hook I, hung from the hoisting-chain t.

The magnet can be moved to any position desired and the electric current can be switched off or on at will, so that if a series of plates, for instance, have to be loaded onto a car the magnet can be adjusted over one of said plates, and when it is in contact therewith the current can be switched on, the magnet attaching itself to the plate, and when the hoisting mechanism of the crane is set in motion the plate will be picked up and carried to the car, and after it is adjusted to the proper place the current can be cut off and the magnet detached from the plate. By this means the plates, especially thin plates, can be picked up without bending and without loss of time in adjusting the claws or chains to the plate.

In many instances two or more plates can be picked up at the same time, depending altogether upon the weight and the magnetic force of the apparatus.

I claim as my invention- 1. The combination in amagnet for lifting heavy loads, of the top plate having means for attaching the lifting mechanism, a core A secured to and depending from said top plate, a spool inclosing the core, a bottom plate of nonmagnetic material through which the core extends, and a protecting casing for the magnet between the top and bottom plates, substantially as described.

2. The combination in a magnet for lifting plates, &c., of the cores A A, the top plate A, a non-magnetic bottom plate through which the cores of the magnet pass, and a shell surrounding the coils of the magnet,substantially as described.

3. The combination of the top plate, two poles of the magnet secured thereto, wrappings of wire for each pole, a bottom plate through which the cores extend, and a shell mounted between the top and bottom plates and surrounding the wrappings of the magnet, substantially as described.

4:. The combination of the top plate, the eye secured thereto by which the magnet is suspended, eores A A, secured to the top plate by bolts, incased wrappings for each core, a bottom plate of non-magnetic material, a shell mounted between the bottom and top plate, and packing between said parts, with bolts passing through the top and bottom plates, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SAMUEL T. WELLMAN. \Vitnesses:

FRANK E. BEcHToLn, .TosEPH H. KLEIN. 

